Q. In face centred cubic unit cell edge length is
A) $2r$
B) $\frac{\sqrt{3}}{2}r$
C) $\frac{4}{\sqrt{3}}r$
D) $\frac{4}{\sqrt{2}}r$
Explanation
(d)
For fcc arrangement,
$4r = \sqrt{2}a$
$a = \frac{4r}{\sqrt{2}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.